Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 20

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
Celem badań była ocena wpływu dodatku ekstraktu lucerny w żywieniu świń na barwę polędwicy i jej zmiany podczas 6-dniowego przechowywania. Zakres badań obejmował ocenę jakości polędwic grupy kontrolnej, pozyskanych ze świń żywionych tradycyjnie (bez udziału ekstraktu lucerny) oraz eksperymentalnej, pozyskanych ze świń żywionych dietą wzbogaconą w ekstrakt lucerny. Badaniami objęto 80 mieszańców [(Polish Large White x Polish Landrace) x Duroc] o masie początkowej około 14 kg. W doświadczeniu wyodrębniono 2 grupy żywieniowe zwierząt; każda grupa liczyła 20 loszek i 20 knurów. Dieta świń grupy kontrolnej nie zawierała dodatku żadnych stymulatorów wzrostu, natomiast dieta świń grupy doświadczalnej była wzbogacona ekstraktem lucerny (2 g na 1 kg paszy). Próbki mięsa przechowywano w warunkach chłodniczych (temperatura 4 ºC) przez 6 dni od uboju. Po 2, 4 i 6 dobach od uboju wykonywano oznaczenia wybranych parametrów jakości mięsa. Zakres badań obejmował oznaczenie: kwasowości, parametrów barwy w układzie CIE L*a*b*. Pomiaru parametrów barwy dokonano metodą odbiciową z wykorzystaniem kolorymetru spektralnego X-Rite 8200. Uzyskane wyniki badań wykazały, że zastosowanie ekstraktu lucerny w żywieniu świń wpłynęło na wartości parametrów barwy mięsa. Stwierdzono, że w całym okresie przechowywania mięso pozyskane ze świń żywionych dietą wzbogaconą w ekstrakt lucerny cechowało się wyższą wartością parametru a*, a więc wyższym udziałem barwy czerwonej.
The influence of some part of fat replacement with buckwheat and oat extrudates, potato starch and soybean protein isolate on colour, texture, microstructure and sensory characteristics of comminuted meat products was studied in the research. Fundamental materials used for manufacturing the model products were: 50% of lean beef, 20% of fine porcine fat, 30% of ice water and plant material introduced instead of the part of fat with the amount of 5, 10 and 20%. Microstructure of meat products was assessed using scanning electron microscopy. The following texture parameters of meat products were evaluated by means of texture profile analysis (TPA): hardness, cohesiveness, elasticity, gumminess, chewiness. Colour parameters of experimental products were determined applying reflective method and expressed in CIE L*a*b* system. The meat products were subjected to sensory desirability estimation. The reduction of the fat content resulted in decrease of texture parameters and general desirability of meat products. Partial fat replacement also influenced the colour of meat products: decrease of redness value along with the increase of fat material replacement was observed.
Background. The key tool used in the European Union in order to eliminate the risks associated with the consumption of potentially hazardous food is RASFF - Rapid Alert System for Food and Feed Safety. The RASFF was established to increase accountability and strengthening cooperation between states of the European Union in the field of food safety control. Objective. The aim of this study was to explore the trends and temporal and spatial distribution of notifications on food safety hazards between January 2011 and December 2015 with a special emphasis on meat and meat products on the basis of notification from RASFF. Material and methods. The study analyzed notifications on the annual reports of the RASFF published by the European Commission and requests added to the portal RASFF in the period 01.01.2011 - 31.12.2015 on the category of “meat and meat products (other than poultry) and “poultry meat and poultry meat products”. Analysis included detailed information on each notification, such as the classification and date, hazard category, notifying country, country origin. Results. The most common classifications of notification were ‘alert’ and ‘border rejection’. Generally, basis of this notifications were ‘company’s own check’ and ‘official control on the market’. Pathogenic microorganisms were the most often hazard of category in which the higher number of notifications concerned with Salmonella spp. Conclusion. Alert notification which is the most dangerous for consumers were the most common type of classification for notifications on ‘meat and meat product’ category. The most of notifications in category ‘poultry meat and poultry meat products’ were the result of border control. Pathogenic microorganisms were the reason for the huge number of notifications in studied product categories. Many of notifications were associated with products which origin countries were outside RASFF member states.
The research was undertaken to examine the effect of the addition of comminuted out roasted at a temperature of 100°C on the oxidative stability of comminuted meat products during their chill storage. It was demonstrated that values of the redox potential of oat-supplemented products were lower during 30-day storage period as compared to values obtained for the control product. The products enriched with a plant supplement were additionally characterised by higher colour stability than the control product. Values of TBA obtained for experimental meat products suggest that the applied oat supplement exerted a protective effect on fat, inhibiting its oxidation during storage of meat products.
Addition of natural antioxidants is one of the ways to extend the durability of meat and meat products. The effects of added pepper extracts on the colour and potential redox changes of beef patties during storage were studied. There were four types of ethanol based extracts of two types of pepper (sweet and hot), compacted at different temperatures: 35 and 50°C. Experimental material consisted of meat samples produced from lean beef 24-hours postmortem. The colour in a CIE L*a*b* systems was examined using an X-Rite reflection spectro-colorimeter. Oxidation-reduction potential was determined using a pH meter (CPC-501) set to the milivolt scale and equipped with a redox electrode ERPt- -13. The results indicate the influence of extracts of different types of pepper added on oxidation-reduction potential values. Meat samples with pepper extract compacted at 35°C addition had a lower oxidation-reduction potential compared with the samples with pepper extract compacted at 50°C addition. Oxidation-reduction potential values of meat samples increased during storage. No significant effects of type of a particular pepper extract on redox potential values were observed. Pepper extracts increased redness (a* value) of meat samples compared to the control, but had no effects on L* values (lightness). During storage of meat samples slight changes of CIE a* parameters were noted.
The objective of this study was to evaluate the effects of genetically modified (GM), insect resistant corn (MON 810) and glyphosate tolerant soybean meal (Roundup Ready, MON 40-30-2), used as the main dietary components, on physico-chemical properties of broilers' breast and thigh muscles. The pH and water holding capacity values of breast and thigh muscles indicated no statistically significant differences between broilers fed diets containing non-transgenic or transgenic feeds. Results for the oxidation reduction potential measurements of the breast muscles from the group fed GM corn and non-modified soybean meal as well as muscles of female chickens from the group fed GM corn and GM soybean meal were significantly lower than those for other dietary treatments. The results of presented study showed that chickens, which had consumed transgenic diet exhibited improved lipid stability of breast and thigh muscles, as indicated by TBARS values. The use of transgenic corn or soybean meal did not cause significant changes in colour parameters L* and b*. Incorporation of transgenic corn and soy bean meal into broilers diet significantly affect the a* colour parameter for breast muscles.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.